A Jaguar spokesman said:’A six-hour plug-in charge of the lithium-ion batteries allows an electric-only range of 68 miles.

‘But the innovative twin-turbines can either charge the car’s batteries, allowing the supercar to travel 560 miles between fill-ups. Or it can automatically provide supplementary power directly to the electric motors to allow the car to top 205mph.’

He added:’It celebrates three-quarters of a century of beautiful, fast, Jaguars by being the fastest and perhaps most beautiful of them all.’